VERY BLUE UV-CONTINUUM SLOPE β OF LOW LUMINOSITYz∼ 7 GALAXIES FROM WFC3/IR: EVIDENCE FOR EXTREMELY LOW METALLICITIES?

@article{Bouwens2010VERYBU,
  title={VERY BLUE UV-CONTINUUM SLOPE $\beta$ OF LOW LUMINOSITYz∼ 7 GALAXIES FROM WFC3/IR: EVIDENCE FOR EXTREMELY LOW METALLICITIES?},
  author={Rychard J. Bouwens and Garth D. Illingworth and Pascal A. Oesch and Michele Trenti and Massimo Stiavelli and Marcella Carollo and Marijn Franx and Pieter van Dokkum and Ivo Labb{\'e} and Daniel K. Magee},
  journal={The Astrophysical Journal},
  year={2010},
  volume={708}
}
We use the ultra-deep WFC3/IR data over the Hubble Ultra Deep Field and the Early Release Science WFC3/IR data over the CDF-South GOODS field to quantify the broadband spectral properties of candidate star-forming galaxies at z {approx} 7. We determine the UV-continuum slope {beta} in these galaxies, and compare the slopes with galaxies at later times to measure the evolution in {beta}. For luminous L* {sub z=3} galaxies, we measure a mean UV-continuum slope {beta} of -2.0 {+-} 0.2, which is… Expand

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